<?php
//DES加密
class Des{
	public static $key = "MYAPPBOX";
	public static function encrypt($input, $key="") { 
		if($key=='')$key = self::$key; 
        $size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);  
        $input = Des::pkcs5_pad($input, $size);  
        $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_ECB, '');  
        $iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);  
        mcrypt_generic_init($td, $key, $iv);  
        $data = mcrypt_generic($td, $input);  
        mcrypt_generic_deinit($td);  
        mcrypt_module_close($td);  
        $data = base64_encode($data);  
		$data = urlencode($data);
        return $data;  
    }  
    private static function pkcs5_pad ($text, $blocksize) {  
        $pad = $blocksize - (strlen($text) % $blocksize);  
        return $text . str_repeat(chr($pad), $pad);  
    }
    public static function decrypt($sStr, $sKey="") {
		if($sKey=='')$sKey = self::$key; 
		$sStr = urldecode($sStr);  
        $decrypted= mcrypt_decrypt(MCRYPT_RIJNDAEL_128,$sKey,base64_decode($sStr),MCRYPT_MODE_ECB);  
        $dec_s = strlen($decrypted);  
        $padding = ord($decrypted[$dec_s-1]);  
        $decrypted = substr($decrypted, 0, -$padding);  
        return $decrypted;  
    }
	
	public static function encryptArr($arr){
		$josn = json_encode($arr);
		return self::encrypt($josn);
	}
	
	public static function decryptArr($str){
		$json = self::decrypt($str);
		$json_arr = json_decode($json);
		return $json_arr;
	}
	
	
	
}
?>